[all-commits] [llvm/llvm-project] 13f38c: [LLVM][SelectionDAG] Align poison/undef binop fold...

[Paul Walker via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 13f38c97d597f3b07fb674d9b8c2b1db2bc0724f
      https://github.com/llvm/llvm-project/commit/13f38c97d597f3b07fb674d9b8c2b1db2bc0724f
  Author: Paul Walker <paul.walker at arm.com>
  Date:   2025-07-30 (Wed, 30 Jul 2025)

  Changed paths:
    M llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
    M llvm/test/CodeGen/AArch64/combine-and-like.ll
    M llvm/test/CodeGen/AMDGPU/saddsat.ll
    M llvm/test/CodeGen/AMDGPU/uaddsat.ll
    M llvm/test/CodeGen/AMDGPU/vector-reduce-smax.ll
    M llvm/test/CodeGen/AMDGPU/vector-reduce-smin.ll
    M llvm/test/CodeGen/AMDGPU/vector-reduce-umax.ll
    M llvm/test/CodeGen/AMDGPU/vector-reduce-umin.ll
    M llvm/test/CodeGen/X86/combine-add-ssat.ll
    M llvm/test/CodeGen/X86/combine-add-usat.ll
    M llvm/test/CodeGen/X86/combine-sub-ssat.ll
    M llvm/test/CodeGen/X86/combine-sub-usat.ll
    M llvm/test/CodeGen/X86/load-combine.ll
    M llvm/test/CodeGen/X86/pr33960.ll
    M llvm/unittests/CodeGen/CMakeLists.txt
    M llvm/unittests/CodeGen/SelectionDAGAddressAnalysisTest.cpp
    A llvm/unittests/CodeGen/SelectionDAGNodeConstructionTest.cpp
    M llvm/unittests/CodeGen/SelectionDAGPatternMatchTest.cpp
    A llvm/unittests/CodeGen/SelectionDAGTestBase.h

  Log Message:
  -----------
  [LLVM][SelectionDAG] Align poison/undef binop folds with IR. (#149334)

The "at construction" binop folds in SelectionDAG::getNode() has
different behaviour when compared to the equivalent LLVM IR. This PR
makes the behaviour consistent while also extending the coverage to
include signed/unsigned max/min operations.



To unsubscribe from these emails, change your notification settings at https://github.com/llvm/llvm-project/settings/notifications